[Haskell-cafe] [ANNOUNCE] GHC 8.8.1 and cabal-install version

Herbert Valerio Riedel hvriedel at gmail.com
Tue Sep 10 06:43:58 UTC 2019

On Tue, Sep 10, 2019 at 12:06 AM Donn Cave <donn at avvanta.com> wrote:

> > https://www.haskell.org/ghc/blog/20190825-ghc-8.8.1-released.html says
> >
> > cabal-install users should note that cabal-install-3.0 or later is
> > required for use with GHC 8.8.
> I'm not the most sophisticated user of cabal-install ever, but it appears
> to me that 8.8.1 can't build  depends on base >= 4.8 && < 4.13,
> where 8.8.1 installs base-

lib:Cabal can be build with GHC 8.8.1 as is evidenced by


it's just the executable exe:cabal that can't be build with GHC
8.8.1; It can however be built with GHC 7.10.3 through GHC 8.6.5 as
evidenced by


However, exe:cabal among other things is planned to be buildable
also with GHC 8.8.1

But it's perfectly fine to use an exe:cabal built with a different GHC than
the one you want to use it with; in fact exe:cabal supports being used with
all GHCs going back to GHC 7.0 (even though you can't build exe:cabal with
GHC 7.0 anymore)

> I'm working with cabal-install- .  It looks like it might
> be possible to up some of the dependencies, like HTTP to 4000.3.14, but
> I suppose there's a reason why cabal-install itself isn't there yet.

Indeed, the main reason is that some of its dependencies weren't
GHC-8.8.1-compatible yet at the time its release. So we didn't yet bother
to update the bootstrap script yet.

What operating system are you on? is it possible for you to use one of the
binaries from http://downloads.haskell.org/~cabal/cabal-install- in
the meantime?

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